Bynes: 'So, um… about those Rihanna tweets…'

Amanda Bynes claims her Rihanna bashing tweets were fake.

The 27-year-old actress recently launched a Twitter attack on the 25-year-old singer, saying Chris Brown beat her up in 2009 because she is "not pretty enough" and while the tweets were sent from Amanda's own account, she has now backtracked and denied writing the offensive messages.